Streetlighting luminaire



J1me 1967 w. M. WALDBAUER 3,328,575

STREETLIGHTING LUMINAIRE 4 Sheets-Sheet 1 Original Filed Dec. 28, 1961 INVENTOR Walter M. Woldbouer TTORNEY June 27, 1967 w. M. WALDBAUER STREETLIGHTING LUMINAIRE 4 SheetsSheet 2 Original Filed Dec. 28, 1961 June 27, 1967 w. M. WALDBAUER 3,328,575

STREETLIGHTING LUMINAIRE 4 Sheets-Sheet 3 Original Filed Dec. 28, 1961 Fig.

J1me 1967 w. M. WALDBAU ER 3,328,575

STREETLIGHTING LUMINAIRE 4 Sheets-Sheet 4 Original Filed Dec. 28, 1961 United States Patent 3,328,575 STREETLIGHTING LUMINAIRE Walter M. Waldbauer, North Olmsted, Ohio, assignor to Westinghouse Electric Corporation, Pittsburgh, Pa., a corporation of Pennsylvania Continuation of application Ser. No. 162,751, Dec. 28, 1961. This application Nov. 16, 1964, Ser. No. 412,593 4 Claims. (Cl. 240-25) This application is a continuation of application Ser. No. 162,751, now abandoned filed Dec. 28, 1961, and assigned to the same assignee as this application.

The present invention relates to structural features of a lighting fixture luminaire and more particularly to a luminaire of the character described for use in streetlighting applications.

Previously proposed luminaires employed for the aforementioned purpose and other exterior applications have generally been so constructed that installation of the luminaire had to be accomplished by means beneath and within the luminaire, similarly, power supply components installation, maintenance, and relamping also had to be conducted from the underside of the luminaire, and the luminaire was so constructed that opening of the entire luminaire housing was necessitated. Such arrangement rendered relamping, maintenance, and installation of the luminaire time-consuming and unnecessarily expensive.

With the advent of the longer internal ballast mercury street luminaire, a better slip-fitter arrangement for fastening the fixture to its support became necessary in order to take up loads arising from luminaire weight, downward wind, vibratory and/ or shock loads and to prevent deforming the support pipe at the slip-fitter, while still permitting leveling adjustments to be made.

Accordingly, it is an object of the invention to provide a novel and eificient luminaire structure. Another object of this invention is to provide a new and improved outdoor luminaire which makes possible installation and major electrical servicing from an advantageous position above the unit Whil optical system cleaning and relamping are still maintained from the desired position below the unit, wherein both refractor and reflector can be demounted from below the unit.

Another object is to provide an efliciently serviced luminaire with a unitized power supply assembly.

It is a further object of this invention to provide a packaged power supply assembly having a plate which serves as a mounting plate and a thermal shield between the transformer and condenser.

Another object of this invention is to provide a luminaire having a novel form of adjustable mounting which is shock absorbing, and prevents support pipe deforming.

Still another object of this invention is to provide a luminaire in which both the housing and the optical system are sealed against the entry of dirt, insects and the elements.

Still a further object of this invention is to provide a sealed three-part luminaire housing having a tilted optical system.

An ancllary object is the provision of means for collecting and eliminating condensed moisture from the interior of the luminaire.

Briefly, the present invention accomplishes the abovecited objects by providing a luminaire consisting of three major sub-assemblies which are the top cover, the housing assembly, and the refractor and ring assembly. The housing sub-assembly is so constructed that it is opened at the top and installation and major electrical service are accomplished from above the unit. Optical system cleaning and relamping are maintained from below the unit through a hinged refractor and ring assembly. After installation the 3,328,575 Patented June 27, 1967 top cover is fitted to the housing for purposes of sealing the top opening of housing. The luminaire is further arranged for the provision of a tilted and/ or sealed optical system in a novel and efiicient manner. Where the luminaire is furnished with internal ballast and other electrical components the same are arranged in a pre-packaged assembly for ready installtion and removal and for operation in a more eflicient manner.

Further objects, features and advantages of this invention will become apparent as the following description proceeds and features of novelty which characterize the invention will be pointed out in particularity in the claims annexed to and forming a part of this specification.

For a better understanding of the invention, reference may be had to the accompanying drawings in which:

FIGURE 1 is a side view of an assembled luminaire constructed in accordance with the invention and to show the invention more clearly partially cut away and sectioned;

FIG. 2 is a side view of the luminaire of FIG. 1 showing internal features thereof;

FIG. 3 shows a cross-sectional view of the luminaire housing taken along line III-III of FIGURE 2;

FIG. 4 shows a cross-sectional view of the slip-fitter taken along line 'IVIV of FIG. 2;

FIG. 5 is a cross-sectional view taken along line VV of FIG. 2;

FIG. 6 shows a cross-sectional view taken along line VIVI of FIG. 2;

FIG. 7 is an enlarged rear view of the latch assembly;

FIG. 8 shows a cross-sectional view taken along line VIII-VIII of FIG. 7.

FIG. 9 is a top plan view of the luminaire housing;

FIG. 10 shows a cross-sectional view of the power supply assembly taken along line X-X of FIG. 9;

FIG. 11 is a longitudinally sectioned view of the power supply assembly taken along line XIXI of FIG. 9;

FIG. 12 shows an enlarged cross-section of the photocell mounting of FIG. 1.

While the invention is herein specifically disclosed as embodied in a streetlighting type of luminaire, it should be understood that the invention in its various aspects may .find application in types of luminaires other than that specifically herein disclosed.

Referring now more particularly to the drawing, the exemplary form of the invention illustrated therein comprises a luminaire having a main structural unit, the housing 20 which is generally open at the top and has a bottom opening 24, the periphery of which is recessed complementally to receiving a refractor ring 57, a top cover as sembly 21 for substantially sealing the top opening of the housing 20, and a ring and refractor assembly 22 for covering the recessed bottom opening 24.

As better shown in FIG. 9, the groove or trough 61 formed in the housing 20 and circumferentially surrounding the recessed bottom opening 24 serves also to collect any moisture condensed in the luminaire and to evacuate the same through screened openings 62 in the bottom of the trough 61. I

As better shown in FIG. 1 of the drawings, the housing structure 20 makes provision for mounting a unitized power supply assembly 26 on internally screw threaded lugs or bosses 28 which are integral with the housing.

A latch :ssembly 30 is securably fastened to the housing 20 at one end thereof to permit opening and closing of the ring and refractor assembly 22 about its hinge 32 which is located approximately midway along the length of the housing. At the end of the luminaire opposite the latch assembly 30 is an opening 34 partially formed in the housing and partially in the top cover through which is inserted the pipe support 36 which may be one of several standard sizes. The top opening of the housing is tapered outwardly about its periphery to provide a tightly fitting, tapered wedge seal with the top cover assembly 21.

In order to seal the top opening of the housing 20, the top cover 21 is positioned in overlapping and abutting relationship with the housing so that the outwardly tapered edge of the periphery'of the housing 20 engages with the matingly tapered peripheral edge of the cover 21. The top cover 21 is held securely in place by means of suitable screw threaded fasteners 38 which are inserted through holes 46 of the cover into female screw threaded holes 42 which are integral with the housing. The screw 38 is held captive to the cover 21 by means of a suitable spring clip 44 which prevents complete removal of the screws 38 from the hole 46. A washer which may be of nylon or any other suitable similar material is inserted between the head of the screw 38 and the hole 46 to provide a moisture seal when the screw is tightened. As the screw 38 is tightened the tapered internal periphery of the top cover 21 is drawn tightly and uniformly over the tapered outer peripheral edge of the top opening of the housing 20 to provide a closely fitting, tapered wedge fit which effects substantial sealing of the joint between the two subassemblies with the exception of the rear opening 34, and at the same time the Washers 40 effectively seal the holes 46 in the top cover. The opening 34 can be sealed with a flexible boot (not shown) around the pipe support 36 to provide a weatherproof and insect proof luminaire.

A reflector 48 is inserted through the recessed bottom opening 24 and engages a spring 50 positioned near the front end of the opening 24 which frictionally holds the reflector in place and urges it rearwardly toward a gasket 80 mounted around the lampholder socket 56. A gasket 52 of a compressible material is interposed between the reflector 48 and the refractor 54 to provide a completely sealed optical system.

Refractor 54 has an outwardly extending flange 55 which is securably fastened to ring 57 by means of rebottom opening 24, it can be seen that the luminaire is substantially weatherproof and insect proof.

In order to better show the interior details FIG. 2 shows the luminaire with the ring and refractor assembly removed and portions of the housing 20, the reflector 48, and the top cover 21 broken 'away or sectioned. As can be seenfrom this figure in conjunction with FIGURE 1, the main structural unit of this luminaire, the open top housing 20, provides means for attachment of the luminaire to the pipe bracket support 36, mounting space for the power supply assembly 26, a lampholder socket 56 together with means for its support and adjustment in reflector 48, plus a hinge assembly 32 and a latch assembly 30.

In this arrangement installation of the electrical com-:

ponents and of the luminaire itself can be effected from above the luminaire, which is less awkward and more efficient since tools and parts are less likely to be dropped.

Moreover, in a luminaire of this type the particular construction of this invention reduces the overall size of the ring and refractor assembly 22 to a minimum and consequently makes its removal for cleaning, relamping, repair or replacement less awkward and bulky. When the ring 57 is in a nearly vertical position, by urging the ring and refractor assembly 22 upwardly and reardwardly it can be readily removed from its hinge 64, and if so desired it can be cleaned as a unit or replaced as a unit during the process of routine maintenance, thus eliminating the necessity of removing the refractor 54 from the ring 57 or the attendant removal of the spring clips 58 which a may be broken or deformed during removal. This operamovable spring clips 58 to comprise the ring and refractor assembly 22 which is hinged at its rearward end by a hinge assembly 32 so that rotation of the ring and refractor assembly 22 will swing it into the recessed bottom opening 24 resulting in a positive alignment of the refractor flange 55 with the gasket 52. The refractor ring 57 is provided with an integrally cast tongue 60 which is outwardly and downwardly extended from the ring at a position generally opposite the hinge so that the action of the latch assembly 30 forces the tongue 60 upwardly to provide a tight seal between the refractor flange 55 and the gasket 52. The novel latch assembly 30 will be discussed in detail later.

As the ring and refractor assembly 22 is rotated about its hinge assembly 32 into its closed position in the recessed bottom opening 24, the bottom exterior-of the ring 57 is virtually flush with the outer periphery of the recessed bottom opening 24. This construction provides a compact construction in that very little space exists between the outer periphery of the ring 57 and the adjacent inward surface of the housing 20 the recessed bottom opening 24 and so that there is practically no space for dead insects or other foreign matter to be trapped about the ring and refractor assembly 22.

In order to drain off any condensation which may accumulate in the housing 20 during normal operation of the luminaire there is a peripheral drip channel 61 formed between the recessed opening 24 and the housing 20 which guides the water to a trough 63 having openings 62 for its discharge. A second trough 63 with an opening 62 is located near the rear opening 34 for removal of moisture in the event that the opening 34 is not sealed. By inserting screens within the openings 62 (shown in FIGURE 9) and a flexible boot in the opening 34 around the support 36, in combination with the advantages of the recessed tion obviously then cuts down on maintenance time.

The hinge assembly 32 for the refractor and ring assembly 22 includes a hinge pivot pin 25 which is affixed to a suitable projection at the end of the ring 57 opposite the latching tongue 60 and a hinge 64 which is secured to the housing. The hinge 64 is so shaped to provide snap insertion and snap removal and free rotation of the ring and refractor assembly 22 about the hinge pivot pin 25. The combination of the shape of the hinge 64 (better shown in FIGURE 3) and the recess 65 in the housing 20 at the location of the hinge assembly 32 prevents accidental removal of the ring and refractor assembly. 22v

while in its free hinging position, but still permits easy removal or assembly when the ring 57 is opened to a position nearly vertical or beyond.

The ring hinge 64 and the mounting support 66 for the tubular lampholder socket 56 are secured to opposite sides of the housing wall by means of a common suitable fastener such as a nut and bolt 68. FIGURE 6 better shows the mounting support 66 as a modified V-shaped extrusion with downwardly extending flanges 67 closely abutting channel walls 82, which are integral with the housing 20 to provide additional rigidity for the socket support 66. The socket 56 is frictionally retained in the mounting support 66 by means of an inverted U-shaped clamping bracket 70 which has horizontally outwardly extending portion 71 at its outer ends and suitable fastening means 72 securing the bracket 70 to horizontally outwardly extending flanges 73 of the mounting support 66. This novel arrangement for mounting the lampholder socket 56 permits rotation of the socket 56 about its axis, plus movement in either direction axially to obtain optimum optical results for a given luminaire system as by centering or otherwise positioning a light source (not shown) relative to the reflector 48. The outer periphery of the lampholder socket 56 provides visual index reference points by means of annular grooves 74 formed therein. A vertical plate 76 having an opening therein of an inner diameter slightly larger than the outer diameter of the socket 56 to permit free movement of the socket 56 within the opening is fastened to the mounting support 66 by suitable fastening means 78. The plate 76 serves as a rigid support for a reflector aperture gasket 80 and may also serve to dissipate heat from the lampholder 56.

The reflector 48 is an inverted dished or generally ovate structure with an integral horizontally outwardly extending flange 84 about its periphery. The flange 84 generally conforms to the peripheral shape of the recessed bottom opening 24. The dished portion of reflector 48 is both removable and insertable through the recessed bottom opening 24, with the rearward end of the reflector 48 having an aperture 49 of oval configuration through which lampholder 56 projects. Prior to insertion of the reflector 48 the reflector aperture sealing gasket 80 is urged over the lampholder 56 toward the gasket support plate 76. The outer periphery of the gasket 80 conforms to the size of the reflector aperture 49 with the exception of the thin flexible lip portion 86 which is of the same oval configuration but of slightly larger overall size to prevent its being extended through the aperture 49. The circular opening in the gasket 80 is approximately of the same outer diameter as the lampholder 56 and its center is located below the center of the gasket 80, and consequently a larger portion of the gasket 80 lies above the lampholder 56 than below it, as is correspondingly true for the aperture 49 for reasons which will be made apparent.

For insertion of the reflector 48 the rearward portion of the reflector flange 84 is positioned at the rearward end of the recessed bottom opening 24 and the reflector 48 is pivoted upwardly about this point into the recessed bottom opening 24. The axially offset, oval shape of the aperture 49 permits the reflector 48 to be readily inserted or removed in this manner. With the reflector 48 thus positioned, it is urged upwardly and rearwardly by the spring 50, which serves to hold the reflector in place and force it against the aperture sealing gasket 80 causing the gasket lip 86 to assume the contour of the outside surface of the reflector 48 in the vicinity of the aperture 49. This arrangement in conjunction with the gasket 52 which is interposed between the reflector flange 84 and the refractor and ring assembly 22 results in a completely and reliably sealed optical system.

The optical system as disclosed in this arrangement is a til-ted optical system whereby the longitudinal axis of the reflector 48 is displaced at an angle to the axis of the lampholder 56 and its lamp, and it is to be understood that it is shown here for illustrative purposes and the invention in its broader aspects is not to be limited thereby. However, the particular construction of the housing 20 with its top opening, as viewed in the drawings, and the downward, angular displacement of the lower housing opening permits the use of a tilted optical system without detracting from the pleasing appearance of the luminaire. Furthermore, the relatively larger top opening of the luminaire housing provides ready access to the electrical components of the luminaire, which otherwise might be obstructed by the displaced reflector and lampholder of the tiled optical system. In addition, the use of a relatively small refractor ring provides ready access to the optical components particularly when employed in a tilted optical system.

As shown in FIG. 2 the slipfitter is fastened to the housing by means of vertical rib bosses 88 and the mounting lugs 108 which are cast integrally with the housing 20.

The slipfitter has a pipe saddle 90 with three pairs of horizontally outwardly extending flanges 91, 101, and 111 (shown in FIG. 9) and is pivotally secured to the vertical rib bosses 88 by insertion of bolts 92 through the vertical rib boss 88 into horizontal tapped holes 96 in flanges 91. Lock washers 94 are inserted between the bolts 92 and the vertical rib bosses 88. At the central portion of the pipe saddle 90 means are provided for clamping the mounting pipe support 36 to the slipfitter, the means consisting of a U-bolt 98 extending upwardly through holes 102 in flanges 101 and secured thereto by washer head nuts 100. An adapter 104 may be fastened to pipe saddle by suitable fastening means 106 to accommodate a smaller size mounting pipe.

FIGS. 2 and 3 show the resilient mounting arrangement of the forward portion of the pipe saddle 90. Studs 110 extend vertically from screw threaded holes in lugs 108, preloaded springs 112 are positioned over studs 110' into recesses in lugs 108, the studs extending upwardly through holes 114 in flanges 111, with each of the flanges 111 also having a recessed portion at the underside thereof to receive the spring 112, and the pipe saddle 90 is secured to the studs 110 by means of suitable stop nuts 116 which may be of the type that have a fibrous or plastic insert to prevent vibratory loosening.

This novel slipfitter permits the use therein of independent clamping means and adjusting means, and prevents deformation of the mounting pipe 36 at the slipfitter. To install the luminaire the cover 21 is removed and the housing 20 is slid onto the bracket pipe s-uport 36 until the vertical stop plate 93 on the pipe saddle 90 is reached. The U bolt 98 is then tightened by means of the washer head nuts to clamp pipe support 36 to the pipe saddle 90. Leveling is accomplished by turning down stop nuts 116 on studs to adjust the longitudinal axis of the housing 20 with respect to the pipe saddle 90 until the top peripheral edge or rim of the housing 20 is level. The pivot bolts 92 are then tightened. Loads arising from luminaire weight, downward wind, vibratory and/or shock loads are taken through the studs and nuts. Upward forces (wind and vibration) are absorbed by the preload spring 112 and the friction developed by clamping the pivot bolt 92.

FIGS. 7 and 8 are enlarged detailed drawings of the latch assembly 30 employed in the invention. The latch assembly 30 consists of a mounting bracket 120, a latch 118, hinge springs 126 and a latch pivot pin 124. The mounting bracket has two sets of normally extending flanges, with the hinge flanges 134 being pivotally secured to the latch 118 through hinge lugs 132 which are integral with the latch 118 and normal thereto, by means of a latch pivot pin 124. The other set of flanges 136 retain one end of the hinge spring 126, the other end of the spring being retained by lugs 138 which are integral with the latch 118. Two closed positions of the latch assembly 30 are provided by a twin step latch bar 129 cast into the latch 118 and having discrete steps 128 and engaging the refractor ring tongue 60. This provides two degrees of latching pressure. The two hinge springs 126 provide hold-open and hold-closed forces as a result of overcenter action relative to the latch pivot. The latch as sembly 30 is mounted in a recess 31 in the housing 20 by means of suitable fasteners such as studs 122 extended through the mounting bracket 120.

The top plan view of the housing 20 is shown in FIG. 9 as having a roughly teardrop shape and in this arrangement is made of die cast aluminum but it is to be understood that the luminaire of this invention may be of any configuration, material, size, or construction consistent with the spirit of the invention.

All points on the periphery of the top opening of the housing 20 are in a common plane with the exception of the recessed portion at the rearward end which forms the bottom part of the Opening 34 through which is inserted the mounting pipe 36. The housing 20 is of a generally shell type cast construction with integral mounting lugs and bosses and recesses 65 and 31 for securing the hinge assembly 32 and the latch assembly 30, respectively, to provide functionality and a pleasing outward appearanee to the assembled luminaire. FIG. 9 shows the mounting of the slipfitter pipe saddle 90 to the vertical rib bosses 88 in the housing 20, and the mounting of a unitized power supply assembly 26 by means of suitable screw-type fasteners 142.

The power supply and ballast assembly 26 is designed to be inserted or removed as a unit and comprises a stepped plate 140 which doubles as a mounting plate and a heat shield, a transformer 150 secured to the upper side of the lower step of the plate 140 'by suitable fastening means 152 (shown in FIG. '11), capacitors 144 secured to the underside of the upper step of the plate 140 by suitable means such as a support bracket 154 and a fastener 156 (shown in FIG. 10), and suitable terminal blocks such as the line terminal block 146 secured to the upper side of the upper step and transformer connection terminal block 148 secured to the transformer housing. The stepped plate 140 serves as a heat baflle between the transformer 150 and capacitors 144 and also aids in the dissipation of heat which can become a problem in an enclosed, internally ballasted luminaire of this type.

The power supply and ballast assembly 26 can be installed or removed as a unit by manipulation of the fastening means 142 which in this case includes four screws engageable with housing lugs 28, and to facilitate such installation or removal the electrical wiring can include quick-release connectors and terminal blocks-Thus, an assembly 26 can be readily installed initially or for replacement purposes, thereby reducing unit luminaire construction or maintenance time. A defectiveassembly can then be bench-tested as a complete unit in the shop.

A top cover 21 can be utilized having provisions for a photocontrol unit 23 such as shown in dotted lines in FIG. 1 and the enlarged sectional detail in FIG. 12. Quick release connections can likewise be used and secured to extra mounting lugs 29 provided for this purpose in the top cover 21 and the housing 20.

As can be seen from the foregoing, the luminaire of the present invention, while having a pleasing outward appearance is additionally functional in the utilization and placement of components in a novel manner to provide a fixture designed for ease and simplicity of maintenance servicing, and installation by means of an open top housing 20 so that installation and major electrical service can be accomplished from above the unit while relamping and cleaning of the optical system are performed from below the unit, which is further simplified by a uniquely arranged, minimum-size refractor ring 57 which is only slightly larger about its periphery than the refractor 54.

I claim as my invention:

1. In a streetlighting luminaire adated to be mounted substantially horizontal on a support means aifixed to one end thereof, the combination comprising:

(a) an elongated main structural unit having a channel-like configuration with longitudinal upwardly disposedopen face;

(b) securing means mounted on said elongated main structural unit proximate one end thereof, said securing means adapted to engage said support means for securing said luminaire in a substantially horizontal position with said longitudinal open face disposed upwardly;

(c) an opening provided proximate the other end of said elongated main structural unit;

(d) a refractor member engaging said structural unit proximate said opening, said refractor member extending over and covering said opening from the outside of said luminaire;

(e) a concave reflector member also engaging said main structural unit proximate said opening, said reflector member extending over and covering said opening from the inside of said luminaire, the concave surface of said reflector member facing said refractor member thereby forming an enclosure comprising said refractor member and said concave reflector member;

(f) lampholding means secured to said luminaire and extending into said enclosure;

(g) electrical components mounted on said main structural unit between said securing means and said lampholding means; and

(h) a removable top cover engaging said main structural unit, said top cover extending over and substantially enclosing said longitudinal upwardly disposed open face, said securing means, said electrical components, and said concave reflector member.

2. In a streetlighting luminaire adapted to be mounted, substantially horizontal on a support means affixedto oneend thereof, the combination comprising;

(a) an elongated main structural unit having a channel-like configuration with a longitudinal upwardly disposed open face;

(b) slip-fitter means mounted on said main structural unit proximate one end thereof, said slip-fitter means adapted to engage said support means for securing said luminaire in a substantially horizontal position with said longitudinal open face disposed upwardly;

(c) an opening provided proximate to the other end of said main structural unit;

((1) a concave refractor member engaging said main structural unit proximate said opening, said refractor member extending away from said luminaire in an outward direction with the concave surface thereof facing said luminaire;

(e) a concave reflector member also engaging said main structural unit proximate said opening, said reflector member extending into said luminaire with.

the concave surface of said reflector facing said concave surface of said refractor member thereby forming an enclosure comprising said concave refractor member and said concave reflector member;

(f) lampholding means secured to said luminaire and extending into said enclosure;

(g) electrical components mounted on said main structural unit between said slip-fitter and said lamphol-ding means; and

(h) a removable top cover engaging said main structural unit, said top cover positioned over and substantially enclosing said longitudinal upwardly disposed open face, said slip-fitter means, said electrical components, at least part of said lampholding means, and said concave reflector member.

3. In a streetlighting luminaire adapted to be mounted substantially horizontal on a supporting means aflixed to one end thereof, the combination comprising;

(a) an elongated main structural unit having a channel-like configuration with a longitudinal upwardly disposed open face;

(b) slip-fitter means adjustably hingedly mounted on said main structural unit proximate one end thereof, said slip-fitter means adapted to engage said support means securing said luminaire in a substantially horizontal position with said longitudinal open face disposed upwardly, the horizontal inclination of said luminaire being adjustable by means of said slipfitter means,

(c) an opening provided proximate the other end of said main structural unit;

((1) a concave refractor member engaging said main structural unit about the periphery of said opening, said refractor member extending away from said luminaire in an outward direction with the concave surface thereof facing said luminaire;

(e) a concave reflector member also engaging said main structural unit about the periphery of said opening, said reflector member extending into said luminaire with the concave surface of said reflector member facing said concave surface of said refractor member thereby forming an enclosure comprising said concave refractor member and said concave reflector member;

(f) lampholding means adjustably secured to said luminaire and extending into said enclosure to an adjustable depth thereof;

(g) electrical components mounted on said main structural unit between said slip-fitter and said lampholding means; and

(h) a removable top cover engaging said main structural unit, said top cover extending over and substantially enclosing said longitudinal upwardly dis'posed open face, said slip-fitter means, said electrical components, at least part of said lampholding means, and said concave reflector member.

4. In a streetlighting luminaire adapted to be mounted substantially horizontal on a support means affixed to one end thereof, the combination comprising;

(a) an elongated main structural unit having a channel-like configuration with a longitudinal upwardly disposed open face;

(b) slip-fitter means mounted on said main structural unit proximate one end thereof, said slip-fitter means adapted to engage said support means for securing said luminaire in a substantially horizontal position with said longitudinal open face disposed upwardly;

(c) a 'bottom opening proximate the other end of said main structural unit opposite said upwardly disposed face;

(d) a concave refractor member engaging said main structural unit about the periphery of said bottom opening, said refractor member extending downwards with the concave surface thereof facing upwards;

(e) a concave reflector member also engaging said main structural unit about the periphery of said bottom opening, said reflector member extending up- 10 wards with the concave surface thereof facing downwards;

(f) lampholding means mounted on said main structural unit at the other end thereof and extending into said concave reflector member;

(g) electrical components mounted on said main structural unit between said slip-fitter and said lampholding means; and

(h) a removable top cover engaging said main structural unit, said top cover positioned over and substantially enclosing said longitudinal upwardly disposed open face, said slip-fitter means, said electrical components, at least part of said lampholding means, and said concave reflector member, whereby When said top cover is removed ready access is provided in the interior of said luminaire for maintenance and repair thereof.

References Cited UNITED STATES PATENTS 3,065,338 11/1962 Husby et al 240-25 3,065,339 11/1962 -Fahey 24025 3,071,683 1/1963 Queale 240-25 NORTON ANSHER, Primary Examiner.

F. L. BRAUN, Assistant Examiner. 

1. IN A STREETLIGHTING LUMINAIRE ADATED TO BE MOUNTED SUBSTANTIALLY HORIZONTAL ON A SUPPORT MEANS AFFIXED TO ONE END THEREOF, THE COMBINATION COMPRISING: (A) AN ELONGATED MAIN STRUCTURAL UNIT HAVING A CHANNEL-LIKE CONFIGURATION WITH LONGITUDINAL UPWARDLY DISPOSED OPEN FACE; (B) SECURING MEANS MOUNTED ON SAID ELONGATED MAIN STRUCTURAL UNIT PROXIMATE ONE END THEREOF, SAID SECURING MEANS ADAPTED TO ENGAGE SAID SUPPORT MEANS FOR SECURING SAID LUMINAIRE IN A SUBSTANTIALLY HORIZONTAL POSITION WITH SAID LONGITUDINAL OPEN FACE DISPOSED UPWARDLY; (C) AN OPENING PROVIDED PROXIMATE THE OTHER END OF SAID ELONGATED MAIN STRUCTURAL UNIT; (D) A REFRACTOR MEMBER ENGAGING SAID STRUCTURAL UNIT PROXIMATE SAID OPENING, SAID REFRACTOR MEMBER EXTENDING OVER AND COVERING SAID OPENING FROM THE OUTSIDE OF SAID LUMINAIRE; (E) A CONCAVE REFLECTOR MEMBER ALSO ENGAGING SAID MAIN STRUCTURAL UNIT PROXIMATE SAID OPENING, SAID REFLECTOR MEMBER EXTENDING OVER AND COVERING SAID OPENING FROM THE INSIDE OF SAID LUMINAIRE, THE CONCAVE SURFACE OF SAID REFLECTOR MEMBER FACING SAID REFRACTOR MEMBER THEREBY FORMING AN ENCLOSURE COMPRISING SAID REFRACTOR MEMBER AND SAID CONCAVE REFLECTOR MEMBER; (F) LAMPHOLDING MEANS SECURED TO SAID LUMINAIRE AND EXTENDING INTO SAID ENCLOSURE; (G) ELECTRICAL COMPONENTS MOUNTED ON SAID MAIN STRUCTURAL UNIT BETWEEN SAID SECURING MEANS AND SAID LAMPHOLDING MEANS; AND (H) A REMOVABLE TOP COVER ENGAGING SAID MAIN STRUCTURAL UNIT, SAID TOP COVER EXTENDING OVER AND SUBSTANTIALLY ENCLOSING SAID LONGITUDINAL UPWARDLY DISPOSED OPEN FACE, SAID SECURING MEANS, SAID ELECTRICAL COMPONENTS, AND SAID CONCAVE REFLECTOR MEMBER. 